CVE-2026-73278
Critical
Description
Gitea's OAuth2 and OpenID Connect sign-in paths do not require a WebAuthn challenge when WebAuthn is the account's only configured second factor. A party able to authenticate through the affected external identity flow can obtain a full session without the passkey verification enforced during password login. One affected path can also persist an external identity link, extending the compromise beyond the initial session; accounts with TOTP configured are outside the reported WebAuthn-only scenario.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Gitea
PublishedOct 6, 2026
First seenOct 6, 2026
Weakness typeCWE-287Improper authentication
How to fix
Update
- gitea gitea1.27.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gitea gitea | 1.16.0 ≤ v < 1.27.2 | 1.27.2 |
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